Improved sheet-metal-fife forming and theeadzng-machxne



tatrrl mes M. K, PIERCE, OF CALAHANS RANCH, CALIFORNIA.

Letters Patent No. 104,196, datedY June 14, 1870.

IMPROVED SHlElEIll/IEIAIi PIIIPE FORMING- AND THREADINGMACHINE.

The Schedule referred to in these Letters Patent and making part of thesame..

To all whom. it may concern:

Be it known that I, M. K. PIERCE, of Calahans Ranch, in the county ofSiskiyou and State of California, have invented a new and improvedSheet-metalpipe Forming and Threading-Machine; and I do-hereby declarethat the following is a full, clear, and ex! act description thereof,which will enable others skilled oblique grooves and ribs along eachmargin, of a forming-roller, having spiralgrooves and projections at theends, so corresponding to those ou the bed that, when placed thereon,its projections ,will lit in the grooves ofthe bed, and the projectionsof the latter will tit in the grooves of the former, and operating gearfor` pressing the roller down upon a sheet placed between it and thebed,and attached at one endito the roller, and rolling the latter alongthe bed, to impart, by lthe said grooves and'projecting spiral threadsto the sheet, which is rolled up atthe same time into tubular form, andforced upon punches, which are so arranged in the bed as to punch thelapping edges of the plate, to form the rivet-holes for connecting them.

Figure l a sectional elevation of 4my improved machine.HA

Figure 2 is a transverse section of the same, and

Figures 3 and 4 are details.

Similar letters of reference indicate corresponding parts.

A is a table or bed, supported in a strong rectangular framing, B, andhaving on each side a plate or bar, O, with grooves and projectionscorresponding to the grooves and projections of the screw-threadrequired on the pipe to be formed. These grooves and projections arepitched obliquely to the longitudinal axis of the table, according tothe pitch reqniredfor thev screw. D is a cylinder, having ou each endspiral threads or grooves and projections, so arranged relatively to theplates C that the prejections of one tit the grooves of the other. Thiscylinder has gear-teeth E, frictionwheels F, and projecting axles G G',the latter being longer than the former.

0n each side of the table A is a toothed rack, H, in which the teeth Eof the cylinder are designed to work, and above these racks are otherracks, I, also designed for the said teeth to gear with, and arranged toslide back and forth on beams K, by which they are sup ported. They alsogear with pinons L on theshaft M, at the end of the machine, on which isa large tooth ed wheel, by which the operating force is applied. Thesebeams K 'are supported on a frame, N, snspended by a rod, from a lever,I, at the top of the frame, between vertical guides Q R, so asto belowered down upon lthe cylinder to impart the pressure,'or to be raisedto admit the roller to he raised for applying the plates to be formedand to remove those act-ed upon, the said pressure being applied to thefra-me N by the screws S and blocks T, which are screwed down upon theframe after the plate has been placed under the roller,'forcing theparts K' of the beams K down upon the frictionrollers F. i y

The frame N is raised byv the lever P and rod O by forcing the saidlever down; the latter is held down and the frame up by swinging ittothe right previous to forcing-it down, to engage it with the hook P'.

In order to provide space under-the blocks T for thus raising the frameN, I have provided sliding bars Tl on the frame N, under the blocks, andconnected them by bars T2 to pins or arms T3 on'the rod O, bywhioh, whenthc lever is turned around, as above described, to engage with the hookI", the bars T will be drawn from under the blocks. After the frame islet down, the lever I is turned back to the left, thereby forcing theplates back under the blocks.

The projecting axles G- G of the roller are connected to bars G2,suspended from a lifting device at the top for raising thc cylinder offthe bed for shifting the plates.

The lifting device consists of a sliding-bar, Hl, arranged in afgrooveor racc in a transverse beam, H2, and a vibrating and lifting lever, H5,the` said beam being provided with -vertical holes for the passage ot'the bars G2, and the sliding bar I-I, having pins H, arranged to beforced through holes in the bars Gr2 by the lever H3, when they arecaused to stand vertically by suitably adjusting the roller, so that, bypressing thelong arm ot' the lever Hi down over its fulornm, after thepins have been thrust in the holes in the said bars, the roller will beraised. This 4lever is engaged withthe catch H5 for holding the rollerup.

The latter is provided with a longitudinal groove in its surface for thcreception of a clamping-bar, D, which is secured by small screws t'passingr 'through the radial longitudinal rib s, said bar being designedfor holding the end of the sheet to be formed, which is inserted betweenthe wall of the groove and the bar,

and the latter is secured or otherwise pressed againstl the said end.

The said roller is also provided with a row of holes, D?, for thereception of the punches Il, iixed in the bed, and adjusted relativelyto the roller, for punching the sheet at the parts where the two endslap, to form the holes for riveting-them together.-

The roller, after having thev sheet attached as described, isi-placed inposition on the bed, and in con-v nection with the toothed racks, carebeing taken to so place it that, when it has performed one revolution,

the holes D2 will arrive at and coincide with the punches torreceivethem in punching theholes.. The frameN is then let down in the mannerdescribed, andthe wheel'ou the shaft M set in motion, to draw therackba'rs I, and rollthe cylinder along, by which thethreads will beformed in the sheet, and thelatter will .be bent up to form the tube.

For makingdiierent sizes of tubes, cylinders D, of

'diieren't sizes, are used, and the screws S are adj ustwith anadjusting-screw, M2, and adjusting-nut, M3.

I propose to arrange the punches D in the bed for adjustment along thesamev as may be required for rollers of diti'erent sizes.

Having thus described my invention,

I claim as new and`desire to secure by Letters Patent-'- l.

1. v'lhe combination of the bed A, plates G with oblique grooves andprojections, and cylinder D with grooves and projections fitting thosein the plates C, all arranged for operation substantially as speciiied.

. tially as specified.

2. The combination with the bed A, plates C, spirally-groovedcylinderDand the toothed racks H I, pinion's E, and friction-rollers,substantially as specified.

- 3. The combination with the spirally-grooved cylinder D, and toothedracks I of ,the guide-beams K, and pressing-trame N, substantially'asspecified. 4.. The combination IWith the frameN ofthe sliding plates T1,adjusting screws lS, blocks. T, arms T2, liftas'speciied. i n l 5. Thecombination with the spirally-grooved cylinder D ofthe lifting bars GZ,beam Hz, lever H3, all substantially. as specified. I

6. The combination, with the lack-bars I and adjustable frame' N, of the-v verticallyadjustable frame M1, driving-shaft M, and pinions L, allsubstantially as specified. p

7. The combination, with the bed A," plate C, and spirally-groovedrollerkD, ofthe punches D, substan- 8. The cylinder D, provided with theprojecting axles Gr1 G1, punch-holes D2, clampingbar D1, andclamping-screws, all substantially as specified.

M. K. PIERCE. Witnesses:

J. W. BLACKBURN, '1. A. DENNY.

ing and oscillating rod 0, and' lever P, substantially bars H1, and l

